Hi everyone...
My boyfriend cummed in me about 16 days ago and then on the 14th day I started my period does that mean I am not pregnant? Please someone answer my question...

If your period was normal and red then I would think you were not pregnant. If it was unusually light and more of a brown/pink color then you may take pregnancy into consideration.
If you did have a normal period (unless you have unprotected sex again) the semen has died and there is no chance of pregnancy after your period. Though I have seen weirder stuff! Some women have bleed all nine months through out there pregnancy. To keep it safe, I say ask your doctor to take a blood pregnancy test. Those are 100% accurate. Best of luck!

If you started your period 2 days after the even there is still the possibility that you are pregnant. You will have to wait to see if your next period comes.